CAREER: Molecular and Engineering Approaches for Analyzing Microbial Selection in Activated Sludge: Competition between Filaments and Floc-formers

职业：分析活性污泥中微生物选择的分子和工程方法：细丝和絮凝剂之间的竞争

• 批准号: 0092851
• 负责人: Francis de los Reyes
• 金额: $ 37.5万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-07-01 至 2007-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0092851&HistoricalAwards=false
• 关键词: CAREER; Molecular; Engineering; Approaches; Analyzing

0092851de los Reyes IIIThe research and teaching efforts in this CAREER proposal will be directed towards examining fundamental activated sludge microbiology using novel molecular techniques. Specifically, the research will focus on the most important component of the most widely used wastewater treatment process: the separation of solids from the effluent in the activated sludge process.This separation leads to the production of a clear effluent in activated sludge and depends on the intricate balance between the populations of filamentous and floc-forming bacteria. However, despite over 80 years of experience with the process, the main parameters affecting the microbial selection of floc-formers over filaments are not thoroughly understood. Consequently, methodsfor controlling excessive filamentous growth that causes settleability problems (bulking) are empirical. A unified theory of microbial selection is thus necessary to provide a sound basis for designing control technologies The research component of this project will combine molecular, modeling, and reactor studies to integrate theories of microbial selection of floc-formers over filaments and develop design guidelines for reactor design and operation. The education component involves the training of undergraduate and graduate students in theprinciples and practices of molecular techniques, the integration of treatment process modelingin graduate water quality courses, the development of a teaching module on applications ofmolecular methods in environmental engineering, the integration of full-scale treatment plantexposure experiences in undergraduate and graduate courses, and participation in the Video-Based Engineering Education program at North Carolina State University. ***

[92851] Reyes iii .本职业计划的研究和教学工作将针对使用新型分子技术研究基础活性污泥微生物学。具体来说，研究将集中在最广泛使用的废水处理工艺的最重要组成部分：活性污泥工艺中固体与废水的分离。这种分离导致活性污泥中产生清澈的流出物，并依赖于丝状菌群和絮凝菌群之间的复杂平衡。然而，尽管有超过80年的工艺经验，影响微生物选择絮凝体而不是细丝的主要参数还没有完全了解。因此，控制导致沉降性问题（膨胀）的过多丝状生长的方法是经验的。因此，需要一个统一的微生物选择理论，为设计控制技术提供良好的基础。该项目的研究部分将结合分子、建模和反应器研究，整合絮凝体在细丝上的微生物选择理论，并制定反应器设计和运行的设计指南。教育部分包括对本科生和研究生进行分子技术原理和实践方面的培训，在研究生水质课程中整合处理过程建模，开发分子方法在环境工程中的应用教学模块，在本科生和研究生课程中整合全面的处理厂暴露经验，并参加了北卡罗莱纳州立大学的视频工程教育项目。* * *